[enh] Docker image: uwsgi serves the static files directly.

When the image is built, the static files are compressed with gzip and brotli.
The expires header is set to one day (same as Flask)
There is not etag header (Flask does add an etag header)

Dockerfile

@@ -50,6 +50,7 @@ RUN apk upgrade --no-cache \
     tini \
     uwsgi \
     uwsgi-python3 \
+    brotli \
  && pip3 install --upgrade pip \
  && pip3 install --no-cache -r requirements.txt \
  && apk del build-dependencies
@@ -61,8 +62,10 @@ RUN su searx -c "/usr/bin/python3 -m compileall -q searx"; \
     touch -c --date=@${TIMESTAMP_UWSGI} dockerfiles/uwsgi.ini; \
     if [ ! -z $VERSION_GITCOMMIT ]; then\
       echo "VERSION_STRING = VERSION_STRING + \"-$VERSION_GITCOMMIT\"" >> /usr/local/searx/searx/version.py; \
-    fi
-
+    fi; \
+    find /usr/local/searx/searx/static -a \( -name '*.html' -o -name '*.css' -o -name '*.js' \
+    -o -name '*.svg' -o -name '*.ttf' -o -name '*.eot' \) \
+    -type f -exec gzip -9 -k {} \+ -exec brotli --best {} \+
 
 # Keep this argument at the end since it change each time
 ARG LABEL_DATE=

dockerfiles/uwsgi.ini

@@ -35,3 +35,10 @@ logto = /var/log/uwsgi/uwsgi.log
 # No keep alive
 # See https://github.com/searx/searx-docker/issues/24
 add-header = Connection: close
+
+# uwsgi serves the static files
+# expires set to one day as Flask does
+static-map = /static=/usr/local/searx/searx/static
+static-expires = /* 864000
+static-gzip-all = True
+offload-threads = %k